How thick does my desk edge need to be for a clamp-mount monitor arm?

Standard C-clamp arms accommodate desk thicknesses from about 0.4 inches (thin glass) up to 3.5 inches (heavy solid wood or built-up laminate). Most commercial desks fall in the 1–1.5 inch range, well within spec. If your desk has an unusually thick edge — 4 inches or more — a grommet or through-bolt mount is the safer choice. FindOfficeFurniture.com lists maximum desk thickness for all clamp-mount arms — call 888-719-4960 if your desk is non-standard.